CN周期太阳中微子与太阳原始核金属丰度
CN-Cycle Solar Neutrinos and Sun's Primordial Core Metalicity
摘要：
我们认为，它可能是利用中微子的CN循环和PP链，以确定原始太阳核丰度的C和N在一个有趣的精度水平。这样的测量将允许比较太阳的深层内部组成与表面，测试标准太阳模型（SSM）的一个关键假设，即均匀的零年龄太阳。它还将对最近的光球丰度测定进行交叉检查，这些测定改变了SSM和日震学之间曾经非常一致的结果。作为进一步的动机，我们讨论了一种推测的可能性，其中光球丰度/日震学难题与伴随着气态巨行星形成的太阳系金属分化有关。核心C和N与13 N和15 O太阳中微子通量之间的理论关系可以通过使用超级神冈中微子捕获率和SNO 8B中微子捕获率来校准太阳核心的温度，从而变得更精确（和更普遍）。原始的C和N的丰度，然后可以从这些中微子通量和从产品的核速率，几乎没有剩余的太阳模型的依赖。我们描述了一些最近的实验进展，可以允许这种比较（理论上）在约9%的水平，并注意到，这种不确定性可能会进一步减少，由于正在进行的工作对14 N（p，γ）的S因子。所设想的测量可能在使用有机闪烁体的深、大体积探测器中实现，例如，Borexino或SNO+
英文摘要：
We argue that it may be possible to exploit neutrinos from the CN cycle and pp chain to determine the primordial solar core abundances of C and N at an interesting level of precision. Such a measurement would allow a comparison of the Sun's deep interior composition with it surface, testing a key assumption of the standard solar model (SSM), a homogeneous zero-age Sun. It would also provide a cross-check on recent photospheric abundance determinations that have altered the once excellent agreement between the SSM and helioseismology. As further motivation, we discuss a speculative possibility in which photospheric abundance/helioseismology puzzle is connected with the solar-system metal differentiation that accompanied formation of the gaseous giant planets. The theoretical relationship between core C and N and the 13N and 15O solar neutrino fluxes can be made more precise (and more general) by making use of the Super-Kamiokande and SNO 8B neutrino capture rates, which calibrate the temperature of the solar core. The primordial C and N abundances can then be obtained from these neutrino fluxes and from a product of nuclear rates, with little residual solar model dependence. We describe some of the recent experimental advances that could allow this comparison to be made (theoretically) at about the 9% level, and note that this uncertainty may be reduced further due to ongoing work on the S-factor for 14N(p,gamma). The envisioned measurement might be possible in deep, large-volume detectors using organic scintillator, e.g., Borexino or SNO+
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